1. Trusted Network Interpretation of the Trusted Computer System Evaluation Criteria;National Computer Security Center,1987
2. Network Security in the 90's;Madron,1990
3. The Cascade problem: Graph Theory can help;Fitch,1991
4. A shortest path network security model;Fitch;Computers and Security,1993
5. The Cascading problem for interconnected networks;Millen,1988